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设计描述：
文档包括:
word版本说明书一份,32页,20000字左右.
CAD版本图纸，共11张:
毕业设计（论文）任务书
一、设计内容(论文阐述的问题)
完成冷藏车车厢设计工作，设计过程应该
(1)、考虑使用条件
(2)、符合有关标准规定，满足使用技术要求。
进行的工作包括：
(1)、冷藏车车厢设计；
(2)、车厢对开门设计；
(3)、性能计算与校核。
二、设计原始资料(实验、研究方案)
(1)、选用南汽NJ131型货车底盘，其主要结构、尺寸及部件见底盘图。
(2)、发动机采用杨柴四缸发动机，其性能参数见发动机说明书。
冷藏车车厢主要参数：
(1) 冷藏车装载质量≥1500kg；
(2) 车厢容积≥10m3；
(3) 车厢总尺寸见总布置图。
三、设计完成后提交的文件和图表(论文完成后提交的文件)
1.计算说明书部分：
说明书一份，它包括：
设计说明书一份，它包括：
(1) 国内外冷藏车发展状况和趋势；
(2) 车厢结构及尺寸分析比较；
(3) 车厢设计的主要原则及依据；
(4) 主要结构形式和技术参数的确定；
(5) 存在的问题与解决的途径。
2.图纸部分
车厢总成图
仓门总成图
仓门铰链总成图
仓门锁总成图
其中包括：至少1张手工图和1张计算机图
摘 要
通过对隔热车厢结构及尺寸的分析比较，完成冷藏车车厢总成设计，其中包括车厢设计、车厢对开门设计及性能计算与校核。
本设计的隔热车厢各部分之间的连接多采用粘接剂而非螺栓和铆钉等金属件，不仅减少了热桥，而且增加了平整度和美观度。隔热材料选用应用最广泛的聚氨酯泡沫，其导热系数较小且具有一定的抗拉抗弯强度，与钢板和胶合板的粘接力较强且密度低，减少了隔热壁厚度，在车厢外尺寸确定的情况下增大了车厢装载容积。车厢门及其附件尽量采用简单可靠的零部件和装配固定方法，确保密封性。根据计算确定的热工参数选用合适的制冷机组并合理完成各部分的安装与固定。
本设计的车厢总成结构简单，性能良好，成本不高，高性能材料和先进技术的应用有效降低了车厢的自重，各参数均符合设计要求。
关键词：冷藏保温汽车，隔热材料，制冷机组，传热系数
ABSTRACT
This paper completed the assemble design of the compartment of the refrigerated truck including the carriage design, the open door design, the performance calculation and verification through analysis and comparison the structure and the size of the insulated compartment.
In this design, the connection between the parts mostly use adhesive rather than rivets, bolts and other metal pieces, which not only reduced the thermal bridge, but also increases the level and degree of beauty. The most extensive application of polyurethane foam is selected for insulation material which not only has small coefficient of thermal conductivity, but also has certain tensile strength and bend strength. The polyurethane foam has excellent adhesive force with the armor plate and the plywood. And the density is low which reduces the thickness of the insulated wall. So when the compartment has fixed external size the stowage volume of the compartment is increased. The door and its accessories as much as possibly use a simple and reliable parts and assembly method to ensure the seal. We should choose a appropriate refrigeration unit according to calculating the parameter of the heat engineering and complete the installation and fixed of various parts reasonably.
This design of the compartment assemble has simple structure, good performance, low cost and the usage of high-performance materials and advanced technology which reduce the compartment’s weight. All parameters in this design are in line with the design requirements.
KEY WORDS: refrigerated and insulated car, insulation material, refrigeration unit, heat transfer coefficient
目录
第一章 绪论??????????????????????????????????????????????????????????3
1.1 冷藏保温汽车的特点???????????????????????????????????????????????3
1.2 冷藏保温汽车的经济意义???????????????????????????????????????????4
1.3 国内外冷藏保温汽车的发展过程和现状???????????????????????????????4
1.3.1 冷藏保温汽车的发展过程???????????????????????????????????????4
1.3.2 国外冷藏保温汽车的发展现状???????????????????????????????????5
1.3.3 我国冷藏保温汽车的发展现状???????????????????????????????????6
1.4 我国冷藏保温汽车的发展趋势???????????????????????????????????????7
第二章 隔热车厢结构???????????????????????????????????????????????10
2.1 制冷装置????????????????????????????????????????????????????????10
2.2 隔热车厢分类????????????????????????????????????????????????????12
2.3 隔热车厢结构????????????????????????????????????????????????????13
2.3.1 隔热车厢的结构型式??????????????????????????????????????????13
2.3.2 隔热层材料及其厚度??????????????????????????????????????????14
2.3.3 断热桥结构??????????????????????????????????????????????????15
2.3.4 车厢蒙皮????????????????????????????????????????????????????15
2.3.5 密封条??????????????????????????????????????????????????????16
2.3.6 车厢门及其附件??????????????????????????????????????????????16
2.3.7 车厢内外附件????????????????????????????????????????????????18
2.4 车厢制作技术现状????????????????????????????????????????????????20
第三章 隔热车厢设计???????????????????????????????????????????????21
3.1 车厢主要结构型式和技术参数的确定????????????????????????????????21
3.2 车厢设计主要技术参数分析和计算??????????????????????????????????22
3.2.1 车厢隔热壁传热系数的计算????????????????????????????????????22
3.2.2 隔热车厢平均传热系数的计算??????????????????????????????????25
3.2.3 制冷设备热负荷的计算????????????????????????????????????????25
3.3 制冷机组的选择??????????????????????????????????????????????????28
3.4 车厢换气倍数的确定??????????????????????????????????????????????28
3.5 车厢重量的计算??????????????????????????????????????????????????29
总结??????????????????????????????????????????????????????????????????30
致谢??????????????????????????????????????????????????????????????????31
主要参考文献?????????????????????????????????????????????????????????32
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